Improvement in postage and revenue stamps



UN TED ST HENRY LOEWENBERG,

PATENT FFICE OF NEW YoRK, N. Y.

YIMPROVEMENTY m POSTAGE AND REVENUE STAMPS.

v Specification forming part of Letters Patent'No- 42,207. dated April5, 1864.

'To all whom it mmz eoncem:

Be it known thatI, ENRY .LoEwENBERq,

of N o. 400 Fourthsstreet, in the city, county,

nnd State 0f New York, have invented a newand Iihproved Stamp forPostage, Revenue,

and other Uses; and I do hereby declare the following to be a full andexact description of "the same.

The ohjectrof my said'invention .is to produce stamps which, afterbeingcanceled by over-printing, or in any pther way, will not permit theremoval of such cancellation-marks withoutdestroying the print. Thisobject I 'efl'ect by solpreparing the paper or other sub stance on whichthe print is to he producedas :to prevent the penetration of the1nk,-printing on this prepared surface, and applying to the oppositeside the adhesive material by which the stamp is to be secured to theletter or other document. Byi-thesejneans a print ispro duced which,when canceled-by over-printing inthe usual way, cannot possiblyvherestored,- for any successful attempt to remove or wash I e Witnesses:

oE th canceling-mark will inevitalily result in the. removal ordefacementof the print itself.

V .In' some instances the effect may be improved by employing for theprinting an ink which, when dry, will'be more readilysoluble thanthatemployed for canceling.

Having thus described myinvention, what I claim asnew, and desireto-secure by Letters Patent, is v A postage, revenue, or other stamp;produced by printing" on sizeapplied to paper or other material toprevent the penetration of the ink, and; applying the adhesive material7 CHAS. L. DU-BoIs,

OcmvrUs KNIGHT.

